[INFO] cloning repository https://github.com/YusukeSuzuki160/abc-f
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YusukeSuzuki160/abc-f" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYusukeSuzuki160%2Fabc-f", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYusukeSuzuki160%2Fabc-f'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23634c423ed3a3fba79bb06dc5adb0245335e39f
[INFO] checking YusukeSuzuki160/abc-f against master#453ceafce32ef8108c604bca5e165ab41d3d6d8c for pr-124187
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYusukeSuzuki160%2Fabc-f" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YusukeSuzuki160/abc-f on toolchain 453ceafce32ef8108c604bca5e165ab41d3d6d8c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+453ceafce32ef8108c604bca5e165ab41d3d6d8c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/YusukeSuzuki160/abc-f
[INFO] finished tweaking git repo https://github.com/YusukeSuzuki160/abc-f
[INFO] tweaked toml for git repo https://github.com/YusukeSuzuki160/abc-f written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/YusukeSuzuki160/abc-f already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+453ceafce32ef8108c604bca5e165ab41d3d6d8c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking YusukeSuzuki160/abc-f against try#773c42f0166e62a538b8fa36161b0c6df69a9640 for pr-124187
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYusukeSuzuki160%2Fabc-f" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YusukeSuzuki160/abc-f on toolchain 773c42f0166e62a538b8fa36161b0c6df69a9640
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+773c42f0166e62a538b8fa36161b0c6df69a9640" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/YusukeSuzuki160/abc-f
[INFO] finished tweaking git repo https://github.com/YusukeSuzuki160/abc-f
[INFO] tweaked toml for git repo https://github.com/YusukeSuzuki160/abc-f written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/YusukeSuzuki160/abc-f already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+773c42f0166e62a538b8fa36161b0c6df69a9640" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proconio-derive v0.1.5
[INFO] [stderr]   Downloaded cli_test_dir v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+773c42f0166e62a538b8fa36161b0c6df69a9640" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f82f858925b90270d49bee9ae85d7a2cbd4fd9426e7a51d1e877720516e9d133
[INFO] running `Command { std: "docker" "start" "-a" "f82f858925b90270d49bee9ae85d7a2cbd4fd9426e7a51d1e877720516e9d133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f82f858925b90270d49bee9ae85d7a2cbd4fd9426e7a51d1e877720516e9d133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f82f858925b90270d49bee9ae85d7a2cbd4fd9426e7a51d1e877720516e9d133", kill_on_drop: false }`
[INFO] [stdout] f82f858925b90270d49bee9ae85d7a2cbd4fd9426e7a51d1e877720516e9d133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+773c42f0166e62a538b8fa36161b0c6df69a9640" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bb768b453e0968a53cf9ccec4a653018bd491478d950557a8fc98fb31ee9daf
[INFO] running `Command { std: "docker" "start" "-a" "2bb768b453e0968a53cf9ccec4a653018bd491478d950557a8fc98fb31ee9daf", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking cli_test_dir v0.1.7
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling proconio-derive v0.1.5
[INFO] [stderr]     Checking proconio v0.3.6
[INFO] [stderr]     Checking abc-f v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]    --> src/main.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     use std::mem;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.71s
[INFO] running `Command { std: "docker" "inspect" "2bb768b453e0968a53cf9ccec4a653018bd491478d950557a8fc98fb31ee9daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb768b453e0968a53cf9ccec4a653018bd491478d950557a8fc98fb31ee9daf", kill_on_drop: false }`
[INFO] [stdout] 2bb768b453e0968a53cf9ccec4a653018bd491478d950557a8fc98fb31ee9daf